INCOME TAXES (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Effective income tax rate	0.00%	38.10%	(1.80%)	37.40%
Valuation allowance	$ 25.6		$ 25.6
Income tax valuation, charge to income	21.9
Income tax valuation allowance, increase to AOCI	3.7
Unrecognized tax benefits	0.2		0.2		$ 0.2
Deferred tax asset valuation allowance			28.6		$ 3.0
Recognized benefit related to uncertain tax positions	0.0	$ 0.0	0.0	$ 0.0
Income tax expense from uncertain tax position (less than)	$ 0.1	$ 0.1	$ 0.1	$ 0.1